[Openuss-developers] AW: [jonas] Error in JOnAS

[Markus K. <mar...@qu...>]

Just once more, for those reading this thread later in the archive:
=20
Do not make it common behaviour to use 'Supports' instead of 'Required'. =
It is only a workaround for this problem. Actually it depends on your =
use case (business behaviour) whether to use 'Supports' or 'Required'. =
Using 'Supports' instead of 'Required' can break some use cases, since =
it results in reading uncommitted data some times. Thus, business =
behaviour is no more deterministic. The benefit you gain is that some =
deadlocks might be away, and access time might be improved.
=20
=20
=20
Mit freundlichem Gruss / With kind regards
Markus KARG, Staatl. gepr. Inf.
Entwicklung / R & D
QUIPSY QUALITY GmbH

________________________________

Von: Philippe Durieux [mailto:phi...@ob...]
Gesendet: Di 25.10.2005 13:56
An: jo...@ob...
Cc: OpenUSS - Developer List
Betreff: Re: [jonas] Error in JOnAS



Philippe Durieux wrote:

> Lofi Dewanto wrote:
>
>> <Philippe>
>> In the case you woulkd use the new lock-policy CRW, available only in
>> 4.6, the restriction are:
>> - the shared flag must be set to false.
>> - the entity bean must be CMP 2.x
>> </Philippe>
>>
>> reading the answer of Philippe above, it seems we cannot use this
>> lock-policy CRW in EB CMP 1.x... :-( Hmm... so my options now are:
>> - Changing all EBs CMP 1.x into 2.x which will be a *huge* rework
>>   we cannot afford.
>> - Restart every 2-3 hours which will "kill" openuss from the user's
>>   perspective.
>> - Reinstall openuss 1.4 with JOnAS 3.x which did not have this =
problem.
>>
>> Very difficult situation... Any ideas?
>>
>> Thanks a lot!
>>
>> =
------------------------------------------------------------------------
>>
>>
>>=20
>>
> As I told you before, you can have a try with policy CRU or DB.
> Maybe they will solve your problems.
>    Philippe
>
>
>------------------------------------------------------------------------=

>
>
>=20
>
Ooops CRU is not a good idea. It requires CMP 2.x also.
Try "database" instead.
You can also try a newer version of JOnAS.
YOu can also change transactional attributes for all methods of your
entity beans that are "read-only" methods:
just set them as "Supports" instead of "Required".

    Philippe